RT Journal Article SR Electronic T1 Longitudinal Epidemiological Study of Autism Subgroups Using Autism Treatment Evaluation Checklist (ATEC) Score JF bioRxiv FD Cold Spring Harbor Laboratory SP 266221 DO 10.1101/266221 A1 Shreyas Mahapatra A1 Edward Khokhlovich A1 Samantha Martinez A1 Benjamin Kannel A1 Stephen M Edelson A1 Andrey Vyshedskiy YR 2018 UL http://biorxiv.org/content/early/2018/07/23/266221.abstract AB Here we report the results of the subgroup analyses of an observational cohort of children whose parents completed the Autism Treatment Evaluation Checklist (ATEC) over the period of several years. A linear mixed effects model was used to evaluate longitudinal changes in ATEC scores within different patient subgroups. All groups decreased their mean ATEC score over time indicating improvement of symptoms, however there were significant differences between the groups. Younger children improved more than the older children. Children with milder ASD improved more than children with more severe ASD in the Communication subscale. There was no difference in improvement between females vs. males. One surprising finding was that children from developed English-speaking countries improved less than children from non-English-speaking countries.